Question

我有以下表格:<%= f. Collection_select :所有者_ids, Owner.order (:id), :id, :name,{},{multiple: real} %>:将所有人名单归为中型表格,但在这方面,我也需要包括这些公司,因此,我也可以在同一名单上列出公司,因此,可造成一个人或一个公司拥有大众媒体。

<>Company>。

class Company < ActiveRecord::Base

  has_many :ownerships
  has_many :massmedia, through: :ownerships
  has_many :owners, through: :ownerships
end

<>strong> Ownerrb

class Owner < ActiveRecord::Base

  has_many :ownerships
  has_many :massmedia, through: :ownerships
  has_many :companies, through: :ownerships
end

<>Massmedium>。

class Massmedium < ActiveRecord::Base
  belongs_to :category

  has_many :ownerships
  has_many :owners, through: :ownerships
  has_many :companies, through: :ownerships

end

Answer 1

= f.select :owners, options_for_select((Owner.all + Company.all)
  .collect{|o| [o.name, "#{o.class},#{o.id}"], {multiple: true}

u 必须在你的模型中界定<代码>所有者=(价值)方法,该方法将同[“Company,1”,”所有者,2”等数值挂钩。

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